Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-01-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
v1: 18 pages including 6 figs; v2: 19 pages including 6 figs, added more refs, fixed wrong labels (to experiments) in figs. 3
Scientific paper
There is no indication so far on the spin of dark matter particles. We consider the possibility in this work that a spin-3/2 particle acts as dark matter. Employing the approach of effective field theory, we list all possible 4-fermion effective interactions between a pair of such fields and a pair of ordinary fermion fields. We investigate the implications of the proposal on the relic density, the antiproton to proton flux ratio in cosmic rays, and the elastic scattering off nuclei in direct detection. While the relic density and flux ratio are sensitive to all interactions albeit at different levels, the direct detection is only sensitive to a few of them. Using the observed data and experimental bounds, we set constraints on the relation of couplings and dark particle mass. In particular, we find that some mass ranges can already be excluded by jointly applying the observed relic density on the one side and the measured antiproton to proton flux ratio or the upper bounds from direct detection on the other.
Ding Ran
Liao Yanbiao
No associations
LandOfFree
Spin 3/2 Particle as a Dark Matter Candidate: an Effective Field Theory Approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin 3/2 Particle as a Dark Matter Candidate: an Effective Field Theory Approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin 3/2 Particle as a Dark Matter Candidate: an Effective Field Theory Approach will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-55749